[Bug 2136005] [NEW] Error message when opening software-properties with update-manager

[Guybrush88]

Public bug reported:

On Xubuntu 26.04, I wanted to open software-properties when using
update-manager, but it didn't open and I got this error message:

Traceback (most recent call last):
  File "/usr/bin/software-properties-gtk", line 99, in <module>
    app = SoftwarePropertiesGtk(datadir=options.data_dir, options=options, file=file)
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 223, in __init__
    self.window_main.set_type_hint(Gdk.WindowTypeHint.DIALOG)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'Window' object has no attribute 'set_type_hint'

** Affects: software-properties (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2136005

Title:
  Error message when opening software-properties with update-manager

Status in software-properties package in Ubuntu:
  New

Bug description:
  On Xubuntu 26.04, I wanted to open software-properties when using
  update-manager, but it didn't open and I got this error message:

  Traceback (most recent call last):
    File "/usr/bin/software-properties-gtk", line 99, in <module>
      app = SoftwarePropertiesGtk(datadir=options.data_dir, options=options, file=file)
    File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 223, in __init__
      self.window_main.set_type_hint(Gdk.WindowTypeHint.DIALOG)
      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  AttributeError: 'Window' object has no attribute 'set_type_hint'

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